James hermann rosenthal



('No Model.)

J. H. ROSENTHAL. SEGTI-ONAL STEAM GENERATOR.

Patented Apr. 23, 1895.

2% 714 eases UNITED STATES PATENT OFF CE.

JAMES HERMANN ROSENTI-IAL, OF LONDON, ENGLAND.

SECTIONAL STEAM -c EN ERATOR.

SLECIFICATION forming part of Letters Patent No. 538,047, dated April23, 1895. Application filed March 17,1 892. Serial No. 425,212. (Nomodel.) Patented in England January 20, 1892, No. 1,134.

To all whom it may concern:

Be it known that I, JAMES HERMANN ROSEN- THAL, a citizen of theUnitedKingdom of Great Britain and Ireland, residing at 114 Newgate Street, inthe city of London, England, have invented new and useful Improvementsin Sectional Steam-Generators, (which have not been patented in anycountry except Great Britain by Letters Patent dated the 20th day ofJanuary, 1892, No. 1,134;) and I do hereby declare that the following isa full, clear, and exact description of the invention, which will enableothers skilled in the art or manufacture to which it relates to make anduse the same.

This invention relates to sectional steam generators and has for itsobject the provision of means for interceptingand removing sludge orimpurities from the water in the inclined tubes in which the watercirculates, and for providing for the scouring or sludging of individualrows of these tubes in order to prevent incrustation.

In the accompanying drawings, Figure 1, is a sectional elevation showingpart of the circulating tubes of a steam generator of the Babcock andWilcox type, Fig. 2, a cross section of the same, and Fig. 3, amodification hereinafter particularly described.

The circulating tubesA are connected to headers 13, at rear and in frontin the usual way, and the ordinarymud drum O is connected to the rearheader. The lower row or rows of tubes A, A instead of extending fromthe front to. the rear headers are under the invention divided in theirlengths and a cross box or drum D is interposed by preference behind oneof the flame bridges B. These tubes at A extend from the rear headers tothe said cross box or drum to which they are attached by expanding andat A they extend from the front headers to the front side of said drum.

The cross box or drum D which may be of any cross section I extendsentirely across a row of tubes and constitutes an interceptor for suchimpurities as do not fall into the mud drum 0, but are carried alongwith the water circulating in these tubes, the impurities beingdeposited as sludge in the bottom of the drum D. To the bottom or end ofthe drum D a blow-off pipe or pipes E is or are connected, the saidpipes being carried to any convenient point and fitted with a cock byopening which the sludge may be blown ofi. to clear the deposit in thedrum D, the tubes subject to the fiercest heat of the fire being thuskept free from liability of incrustation.

As shown at Fig, 3, the cross box or drum D may be interposed in thelength of the circulating tubes A at a point behind the bridge O of theboiler furnace II and the blow-off pipe E led down behind the bridgesinto a supplemental cross box or drum D, or directly to a lower crosspipe E, and thence through the'ash box, the stop cock being eitheroutside or as shown operated by a rod or lever passed through the ashbox.

Having thus described the invention, What I desire to secure by LettersPatent is 1. A sectional steam-generator composed of a series of rows ofcirculating tubes connected to, and in direct communication with headersat their respective ends, and having a muddrum extending transverselyacross the lower most row of such series of tubes, intermediate of theirlength, and in open connection with each tube of said row; and abloW-ofi pipe extending from said'drum, substantially as and for thepurposes specified.

2. In combination witha sectional steamgenerator, composed of a seriesof rows of circulating tubes connected to, and in direct communicationwith headers at their respective ends, and having a mud-drum in openconnection with the rear header, an auxiliary mud-drum extendingtransversely across the lowermost row of such series of tubes,intermediate of their length and in open connection with each tube ofsaid row; and blow-off pipes extending from said drums, substantially asset forth.

In-witness whereof I have hereunto set my hand and seal this 23d day ofJanuary, 1892.

JAMES HERMANN ROSENTHAL. [L 8.]

Witnesses:

WALLACE FAIRWEATHER, JOHN ARMSTRONG, J r.

